AWALITICAL PROCEDURE FOR THE SEPARATIOW 4MD DETERMINATION
OF RADIO IN 100 GRAMS OF SOIL
ae
1.
Except for the addition of 20 ug of Sr** carrier, Steps 1
2.
Then the carvomts precipitate is dry, renove from the filt
paper and trenefer to a pyrex glass tray.
18 of the Sr®® °° orecedure are carried out exactly the sam
wey.
Loe
3. Place in a 100°C oven and dry overnight.
4.
Now break up the aggregated material with a spatula and c
as well as possible with a pestle.
S. Return the material to a 100°C oven amd dry again.
6.
Finally place the dried precipitate in a copper radon co
ing tube. Plug up both ends with pyrex wool, flush out
tube with hydrogen and then seal. Record the time.
7.
Yor full equilibriwm, allow a 0 day buildup, but shorter
buildup times are useable. Messure the radon in an iors
chamber radon counting apparatus.
This method of radon collection is relatively wmtried, but s
sample gave the following result,
g Ra per g¢ Soil
Senple
Added
Soil Mo. 1b
o
Pourd
:
5.2 x 197?
Spiked soil Mo. 1s 4.0 x 107
388. x 197?
m0 66
ONCLASSIFIED
00131986.058